CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues
Property-liability insurance premiums	$ 6,432	$ 6,499	$ 19,337	$ 19,515
Life and annuity premiums and contract charges	552	548	1,668	1,637
Net investment income	994	1,005	2,996	3,104
Realized capital gains and losses:
Total other-than-temporary impairment losses	(197)	(99)	(435)	(637)
Portion of loss recognized in other comprehensive income	(6)	(68)	(37)	(91)
Net other-than-temporary impairment losses recognized in earnings	(203)	(167)	(472)	(728)
Sales and other realized capital gains and losses	467	23	889	(215)
Total realized capital gains and losses	264	(144)	417	(943)
Total revenues	8,242	7,908	24,418	23,313
Costs and expenses
Property-liability insurance claims and claims expense	5,132	4,603	15,963	14,109
Life and annuity contract benefits	455	445	1,331	1,372
Interest credited to contractholder funds	405	445	1,240	1,358
Amortization of deferred policy acquisition costs	1,122	1,006	3,191	2,969
Operating costs and expenses	825	828	2,465	2,446
Restructuring and related charges	8	9	28	33
Interest expense	92	91	275	275
Total costs and expenses	8,039	7,427	24,493	22,562
Gain (loss) on disposition of operations		9	(17)	12
Income (loss) from operations before income tax expense (benefit)	203	490	(92)	763
Income tax expense (benefit)	38	123	(156)	131
Net income	$ 165	$ 367	$ 64	$ 632
Earnings per share:
Net income per share - Basic (in dollars per share)	$ 0.32	$ 0.68	$ 0.12	$ 1.17
Weighted average shares - Basic (in shares)	512.0	540.9	520.4	540.6
Net income per share - Diluted (in dollars per share)	$ 0.32	$ 0.68	$ 0.12	$ 1.16
Weighted average shares - Diluted (in shares)	514.2	543.0	522.9	542.7
Cash dividends declared per share (in dollars per share)	$ 0.21	$ 0.20	$ 0.63	$ 0.60